GB/T 176-2017 PDF EnglishUS$625.00 · In stock · Download in 9 seconds
GB/T 176-2017: Methods for chemical analysis of cement Delivery: 9 seconds. True-PDF full-copy in English & invoice will be downloaded + auto-delivered via email. See step-by-step procedure Status: Valid GB/T 176: Historical versions
GB/T 176-2017: Methods for chemical analysis of cement---This is an excerpt. Full copy of true-PDF in English version (including equations, symbols, images, flow-chart, tables, and figures etc.), auto-downloaded/delivered in 9 seconds, can be purchased online: https://www.ChineseStandard.net/PDF.aspx/GBT176-2017NATIONAL STANDARD OF THE PEOPLE’S REPUBLIC OF CHINA ICS 91.100.10 Q 11 Replacing GB/T 176-2008 Methods for chemical analysis of cement (ISO 29581-1.2009 Cement - Test methods - Part 1.Analysis by wet chemistry, NEQ) Issued on. DECEMBER 29, 2017 Implemented on. NOVEMBER 01, 2018 Issued by. General Administration of Quality Supervision, Inspection and Quarantine; Standardization Administration of PRC. Table of ContentsForeword... 6 1 Scope... 11 2 Normative references... 11 3 Terms and definitions... 12 4 Basic requirements for test... 13 5 Preparation of specimens... 15 6 Chemical analysis methods... 16 7 X-ray fluorescence analytical methods... 100 8 Inductively coupled plasma emission spectroscopy... 116 Appendix A (Informative) Example for calculation of metering point in potentiometric titration for chloride ion... 124 Appendix B (Informative) Reference chromatographic conditions and chromatograms of carbonate eluent... 125 Appendix C (Informative) Recommended wavelength for inductively coupled plasma emission spectroscopy... 1261 ScopeThis standard specifies methods for chemical analysis of cement, X-ray fluorescence analysis methods, inductively coupled plasma emission spectrometry for the determination of loss on ignition (LOI), SO3, insoluble (IR), SiO2, Fe2O3, Al2O3, CaO, MgO, TiO2, Cl-, K2O, Na2O, S2-, MnO, P2O5, CO2, ZnO, F-, free calcium oxide (fCaO), SrO. Chemical analysis methods of cement are further divided into reference methods and alternative methods. If multiple determination methods are listed for the same component, the reference method shall prevail in case of dispute. This standard applies to general Portland cement, clinker, raw material for the preparation of the above cement, other cements and materials designated to use this standard.2 Normative referencesThe following documents are essential to the application of this document. For the dated documents, only the versions with the dates indicated are applicable to this document; for the undated documents, only the latest version (including all the amendments) are applicable to this standard. GB/T 5762 Methods for chemical analysis of limestone, quicklime and hydrated lime for building materials industry GB/T 6682 Water for analytical laboratory use - Specifications and test methods GB/T 8170 Rules for rounding off for numerical values & expression and judgement of limiting values GB/T 12573 Sampling method for cement GB/T 15000 (all parts) Directives for the work of reference materials GSB 08-1110 Standard sample of cement raw materials for X-ray fluorescence analysis GSB 08-1355 Standard sample for analysis of cement clinker composition GSB 08-1356 Standard sample for composition analysis of ordinary Portland cement3 Terms and definitionsThe terms and definitions as defined in GB/T 15000 (all parts) and the following terms and definitions apply to this document. 3.1 Repeatability conditions The conditions under which the same operator uses the same equipment in the same laboratory according to the same determination method to obtain independent test results from the same test subject in a short time. 3.2 Reproducibility conditions Conditions under which different operators in different laboratories use different equipment but same determination method to obtain the test results from the same determination object. 3.3 Repeatability limit A value, under the repeatability condition (3.1), the probability that the absolute difference between the two test results does not exceed this number is 95%.4 Basic requirements for test4.1 Number of tests and requirements The number of tests for each determination is specified as two; the absolute difference between the two results is within the repeatability limit (Table 3, Table 4, Table 5). The average value of the two test results is used to indicate the determination result. 4.2 Representation of mass, volume, titer and results Mass is expressed in "grams (g)" and is accurate to 0.0001 g. The volume of the burette is expressed in "milliliter (mL)"; the reading is accurate to 0.01 mL. The titer is expressed in "milligrams per milliliter (mg/mL)". 4.3 Repeatability limit and reproducibility limit The repeatability limits and reproducibility limits listed in this standard are absolute deviations, expressed in terms of mass fraction (%). 4.7 Checking chloride (silver nitrate inspection) After washing the precipitate several times as required, use water to rinse the lower end of the funnel; continue using water to wash the filter paper and the precipitate; collect the filtrate in a test tube; add a few drops of silver nitrate solution (6.1.31); observe whether the solution in the test tube is turbid. If it is turbid, continue washing and testing until it is no longer turbid when checking by the use of silver nitrate. 4.8 General requirements for reagents Unless otherwise specified, the reagents used shall not be lower than analytical grade; the reagents used for calibration shall be reference reagents. The water used shall not be lower than the requirements of the third-grade water as specified in GB/T 6682.5 Preparation of specimensTake sample according to the method of GB/T 12573.The sample sent to the laboratory shall be a representative uniform sample. The sample is divided to about 100 g by a quartering method or a divider. After sieving through a 150 μm square hole sieve, the debris is removed. After the sieve residue is ground, it is passed through a 150 μm square hole sieve.6 Chemical analysis methods6.1 Reagents and materials 6.1.1 Hydrochloric acid (HCl) 1.18 g/cm3 ~ 1.19 g/cm3, mass fraction is 36% ~ 38%. 6.1.2 Hydrofluoric acid (HF) 1.15 g/cm3 ~ 1.18 g/cm3, mass fraction is 40%. 1.12 g/cm3, mass fraction is 99%. 6.1.12 Ethanol The volume fraction of ethanol is 95%. 6.1.13 Absolute ethanol (C2H5OH) The volume fraction of absolute ethanol is not less than 99.5%. 6.1.14 Glycerol [C3H5 (OH) 3] The volume fraction is not less than 99%. 6.1.18 Nitric acid (1 + 1); (1 + 2); (1 + 9); (1 + 100) 6.1.19 Sulfuric acid (1 + 1); (1 + 4); (1 + 9); (5 + 95) 6.1.20 Phosphoric acid (1 + 1) 6.1.21 Acetic acid (1 + 1) 6.1.22 Formic acid (1 + 1) 6.1.23 Ammonia (1 + 1) 6.1.24 Ethanol (1 + 4) 6.1.25 Triethanolamine (1 + 2) 6.1.26 Sodium hydroxide (NaOH) 6.1.34 Ammonium molybdate solution (50 g/L) Dissolve 5 g of ammonium molybdate [(NH4) 6Mo7O24 · 4H2O] in hot water; after cooling, add water to dilute it to 100 mL; store it in a plastic bottle; if necessary, filter it before use. This solution is used within one week. 6.1.35 Ascorbic acid solution (5 g/L) Dissolve 0.5 g of ascorbic acid (V.C) in 100 mL of water; if necessary, filter it before use. Prepare it before use. 6.1.47 Potassium periodate (KIO4) 6.1.48 Sodium hydroxide solution (200 g/L) Dissolve 20 g of sodium hydroxide (NaOH) in water. Add water to dilute it to 100 mL. Store it in a plastic bottle. 6.1.55 pH 4.3 buffer solution Dissolve 42.3 g of anhydrous sodium acetate (CH3COONa) in water; add 80 mL of glacial acetic acid; add water to dilute it to 1 L. After preparation, use a precision pH test paper to check. 6.1.56 Potassium fluoride solution (20 g/L) Place 20 g of potassium fluoride (KF · 2H2O) in a plastic cup; add water to dissolve it; add water to dilute it to 1 L; store it in a plastic bottle. 6.1.57 Ammonium oxalate solution (50 g/L) Dissolve 50 g of ammonium oxalate [(NH4) 2C2O4 · H2O)] in water; add water to dilute it to 1 L; if necessary, filter it before use. 6.1.58 Potassium sodium tartrate solution (100 g/L) Dissolve 10 g of potassium sodium tartrate (C4H4KNaO6 · 4H2O) in water; add water to dilute it to 100 mL. 6.1.59 pH 10 buffer solution Dissolve 67.5 g of ammonium chloride (NH4Cl) in water; add 570 mL of ammonia; add water to dilute it to 1 L. After preparation, use a precision pH test paper to check. 6.1.77 Manganese monoxide (MnO) standard solution 6.32.3 Calculation and representation of results The mass fraction of chloride ion wCl- is calculated according to formula (53). 6.33.3 Calculation and representation of results The mass fractions of potassium oxide and sodium oxide wK2O and wNa2O are calculated according to formula (54) and formula (55), respectively. 6.34.2 Analytical procedures Take solution C in 6.11.2.1 directly; use an atomic absorption spectrophotometer (6.2.15); 6.34.3 Calculation and representation of results The mass fraction wMnO of manganese monoxide is calculated according to formula (56). 6.35.2 Analytical procedures Weigh about 0.2 g of specimen (m47), accurate to 0.0001 g; put it in a 100 mL dry beaker; add 10 mL of water to disperse the specimen; ......Source: Above contents are excerpted from the full-copy PDF -- translated/reviewed by: www.ChineseStandard.net / Wayne Zheng et al. Tips & Frequently Asked Questions:Question 1: How long will the true-PDF of English version of GB/T 176-2017 be delivered?Answer: The full copy PDF of English version of GB/T 176-2017 can be downloaded in 9 seconds, and it will also be emailed to you in 9 seconds (double mechanisms to ensure the delivery reliably), with PDF-invoice.Question 2: Can I share the purchased PDF of GB/T 176-2017_English with my colleagues?Answer: Yes. The purchased PDF of GB/T 176-2017_English will be deemed to be sold to your employer/organization who actually paid for it, including your colleagues and your employer's intranet.Question 3: Does the price include tax/VAT?Answer: Yes. Our tax invoice, downloaded/delivered in 9 seconds, includes all tax/VAT and complies with 100+ countries' tax regulations (tax exempted in 100+ countries) -- See Avoidance of Double Taxation Agreements (DTAs): List of DTAs signed between Singapore and 100+ countriesQuestion 4: Do you accept my currency other than USD?Answer: Yes. www.ChineseStandard.us -- GB/T 176-2017 -- Click this link and select your country/currency to pay, the exact amount in your currency will be printed on the invoice. Full PDF will also be downloaded/emailed in 9 seconds.Question 5: Should I purchase the latest version GB/T 176-2017?Answer: Yes. Unless special scenarios such as technical constraints or academic study, you should always prioritize to purchase the latest version GB/T 176-2017 even if the enforcement date is in future. Complying with the latest version means that, by default, it also complies with all the earlier versions, technically.How to buy and download a true PDF of English version of GB/T 176-2017?A step-by-step guide to download PDF of GB/T 176-2017_EnglishStep 1: Visit website https://www.ChineseStandard.net (Pay in USD), or https://www.ChineseStandard.us (Pay in any currencies such as Euro, KRW, JPY, AUD).Step 2: Search keyword "GB/T 176-2017". Step 3: Click "Add to Cart". If multiple PDFs are required, repeat steps 2 and 3 to add up to 12 PDFs to cart. Step 4: Select payment option (Via payment agents Stripe or PayPal). Step 5: Customize Tax Invoice -- Fill up your email etc. Step 6: Click "Checkout". Step 7: Make payment by credit card, PayPal, Google Pay etc. After the payment is completed and in 9 seconds, you will receive 2 emails attached with the purchased PDFs and PDF-invoice, respectively. Step 8: Optional -- Go to download PDF. Step 9: Optional -- Click Open/Download PDF to download PDFs and invoice. See screenshots for above steps: Steps 1~3 Steps 4~6 Step 7 Step 8 Step 9 |
